抄録
北部九州におけるダイズの安定多収栽培技術を確立するために,過去15年間におけるダイズの収量および収量構成要素と時期別気象との関係について解析した.収量と密接に関係があると認められた収量構成要素は,百粒重とm^2当たり整粒数およびm^2当たり稔実莢数で,なかでも百粒拉重とm^2当たり整粒数は収量に対する寄与率が高かった.収量および収量構成要素と時期別気象要因との間には直線的な関係は認められず,収量,百粒重およびm^2当たり整粒数は開花期〜子実肥大初期の気温との間にそれぞれ有意な二次曲線の関係が認められ,m^2当たり整粒数・百粒重ともに最適温度は25℃前後であった.さらに,m^2当たり整粒数は子実肥大初期〜成熟期の多照で増加した.M^2当たり穆実英数は間花期前後1週間の降水量と曲線的な関係が認められ,130mm以下の乾燥状態では降水量が多いほど,m^2当たり稔実莢数が増加することを示した.
The relationships between soybean and meteorological conditions were statistically analyzed from 1985 to 2000, in order to establish cultivation techniques that improve the yield of soybean in Northern Kyushu. Simple correlation analysis showed a significant positive correlation between the yield and 100-grain weight, grain number per m^2 or ripening pod number ripening per m^2. Multiple regression analysis, however, showed no significant positive correlation between the yield and pod number. Multiple regression analysis also showed no linear relationship between the yield and yield components, or meteorological conditions of three periods. The yield, 100-grain weight and grain number per m^2 showed a quadratic correlation with air temperature. The optimum mean daily air temperature from flowering to grain thickening stage for 100-grain weight and grain number per m^2 was about 25℃. A strong positive relationship was detected between the 7-day total precipitation around the flowering and the pod number under dry conditions with a preciptation of less than 130 mm.
